<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./css/reset.css">
    <style>
        .box {
            width: 100px;
            height: 100px;
            background-color: black;
            border-top-left-radius: 50px;
            border-top-right-radius: 50px;
            border-bottom-right-radius: 50px;
            border-bottom-left-radius: 50px;
        }

        .box1 {
            width: 502px;
            height: 38px;
            margin: 0 auto;
            background-color: white;
            border: none;
            
            

        }

        .box1 .input {
            box-sizing: border-box;
            width: 398px;
            height: 38px;
            float: left;
            padding: 0 15px;
            border-top-left-radius: 45px;
            border-bottom-left-radius: 45px;
        }
        .box1 .submit {
            width: 103px;
            height: 38px;
            float: left;
            border-top-right-radius: 45px;
            border-bottom-right-radius: 45px;

        }
        .input .submit:hover{
            color: springgreen;
        }

        .box2 {
            width: 300px;
            height: 100px;
            background-color: blue;
            border-radius: 50% 90%;
        }

        .box3 {
            width: 400px;
            height: 100px;
            background-color: #bfc;
            border-radius: 9% 8% 7% 1%;
        }
    </style>
</head>

<body>
    <div class="box"></div><br><br><br><br>
    <div class="box1">
        <form action="#">
            <input class="input" type="text" name="">
            <input class="submit" type="submit" value="全网搜">
        </form>
    </div><br><br><br><br>
    <div class="box2"></div>
    <div class="box3"></div>
</body>

</html>